Abstract
Poly- p-phenylenebenzobisoxazole (PBO)-filled polytetrafluoroethylene (PTFE) has been successfully prepared at different compositions in a corotating twin-screw extruder, where PTFE acts as the polymer matrix and PBO as the dispersed phase. The morphology and impact properties of these blends were investigated using scanning electron microscopy. The presence of PBO particles dispersed in the PTFE continuous phase exhibited a coarse morphology. Increasing PBO contents in the blend improved the impact properties at weak deformation. It was found that the interfacial adhesion played an important role in the creation of an interphase that was formed by the interaction between the PTFE and the PBO. This induced an improvement in impact properties. In addition, the optimum impact properties were obtained when the content of PBO is 30 vol%.
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